php using the extended monitoring inotify file or directory, if changed, will execute the specified command

? <PHP 

class Monitor 
{ 
    public $ the dir = ''; 
    public $ cmd = ''; 
    public $ timeout =. 1; 

    public function the __construct () 
    { 
        IF (! extension_loaded ( 'inotify')) { 
            echo 'install inotify extension' , value is PHP_EOL; 
            Exit; 
        } 
        // parse command line parameters, a: represents a number required 
        $ = the opts the getopt ( '', [ 'the dir:', 'cmd:']); 
        IF (! $ the opts) { 
            echo 'parameter input error', value is PHP_EOL; 
            Exit; 
        } 
        IF (empty (the opts $ [ 'the dir'])) { 
            echo 'is required --dir', value is PHP_EOL; 
            Exit;
        } 
        if (empty($opts['cmd'])) {
            Echo '--cmd is mandatory', PHP_EOL;
            Exit; 
        } 
        $ this-> the opts the dir = $ [ 'the dir']; 
        $ this-> cmd = TRIM (the opts $ [ 'cmd']); 
        $ this-> RUN (); 
    } 

    // the directory monitor 
    public RUN function () 
    { 
        $ dirs = $ this-> getDirs (this- $> the dir); 
        IF (empty ($ dirs)) { 
            return to false; 
        } 
        $ FD = inotify_init (); 
        // Sets the nonblocking mode 
        stream_set_blocking ( $ FD, 0); 
        the foreach ($ dirs AS $ the dir) { 
            $ Watch = inotify_add_watch ($ FD, $ the dir, as IN_MODIFY | the IN_CREATE | IN_DELETE | IN_DELETE_SELF | IN_CLOSE_WRITE);
                exit; 
            if (!$watch) {
                echo "{$ dir} add monitoring error", value is PHP_EOL; 
            } 
        } 
        the while (to true) { 
            $ the reads = [$ FD]; 
            $ Write = []; 
            $ the except = []; 
            IF (stream_select ($ the reads, $ Write, the except $, $ this-> timeout)> 0) { 
                ! IF (empty (the reads $)) { 
                    the foreach ($ $ Read the reads AS) { 
                        // file changes 
                        $ = fileChg to false; 
                        // change directory 
                        $ dirChg = false; 
                        // read the data stream read from 
                        $ = inotify_read Events ($ read); 
                        $ fileName = ''; 
                        the foreach (AS $ $ Events Event) { 
                            $ fileName = $ Event [ 'name'];
                            Switch ($ Event [ 'mask']) { 
                                Case the IN_CREATE: 
                                Case IN_DELETE: 
                                    $ fileChg = to true; 
                                    BREAK; 
                                Case 1,073,742,080: 
                                Case 1,073,742,336: 
                                    $ dirChg = to true; 
                                    BREAK; 
                            } 
                        } 
                        if ($fileChg) {
                            echo "file {$ fileName} changed, performed $ this- command {>} cmd ", value is PHP_EOL; 
                            echo shell_exec ($ this-> cmd), value is PHP_EOL; 
                        } 
                        IF ($ dirChg) { 
                            echo "{$ fileName} directory changes, Run {$ this-> cmd}", value is PHP_EOL; 
                            echo shell_exec ($ this-> cmd), value is PHP_EOL; 
                            return $ this-> RUN (); 
                        } 
                    } 
                } 
            } 
        } 
        return to true; 
    } 

    accessories subdirectory path to the current directory // recursive 
    public function getDirs ($ dir ) 
    { 
        $ The realpath the dir = ($ the dir); 
        $ DH = the opendir ($ the dir); 
        ! IF ($ DH) { 
            return []; 
        } 
        $ dirs = []; 
        $ dirs [] = $ the dir;
        while (($file = readdir($dh)) !== false) {
            if ($file == '.' || $file == '..') {
                continue;
            }
            $full = $dir . DIRECTORY_SEPARATOR . $file;
            if (is_dir($full)) {
                $dirs = array_merge($dirs, $this->getDirs($full));
            }
        }
        closedir($dh);
        return $dirs;
    }
}

(new Monitor());